Aligner for engine pistons



Jan. 16, 1923. 1,442,102.

0. c. SPANGENBERGER.

ALIGNER FOR ENGINE PISTONS.

FILED MAYV24, x921.

/r1 verr for.- air-Z C. sp anqenl er'yer aviation, automobile, and otherengme-pis v p "for ahnement of the; piston in" different I po'-,sitions.- The aligner plate Qhis, also rota- Patented Jan. 16, 1923.

canto; srAnGENBEnG n, onvENio'E,.oALiFonNrAq f mememan P ams;

Application filed May 24,1921;

at Venice, in the county of Los Angeles' and State of California, haveinvented a new and useful Aligner for Engine J Pistons 'of which-thefollownig is a specification;

1 The invention relates tomeans fora'lin ng tons perpendicular to thecrankshaft, and

for finding twists in the connecting rods,

' and the main- -object of the invention is to provide convenientandefi'ective means for this purpose which will ensure correct aline.-

ment with reference to the axis of the shaft.

The accompanying drawings illustrate the invention} and referringthereto Fig. 1 is a side elevation of the aligner in position for use,the engine shaft and piston being indicated in dotted lines;-

' Fig. 2 isan elevation atrightangles to Fig. l. Y I The form of theinvention shown in the drawings comprises a faceplate 1 having afinished or surfaced face 2 formed as a plane surface, said plate beingmounted eccentri-- cally on a stem or supporting rod 3 extending througha split clamping sleeve 4 on a supporting arm 5, said clampin'gsleevebeing provided with a bolt or screw 6 for tightening the same onthe stem 3 whereby the face plate 'may be adjusted relatively to thesupporting arm 5. On account'of the eccentric mounting of the face plate1 on 35 the rod 3, said face plate extends farther in one direction (theupward direction in position shownin Fig. 1) from its center of rotationthan in the opposite direction, enabling it to be placed alongside thepiston in either up or down position of same, and to avoid interferencewith the crank pin in the upward throw thereof, the face plate beingthen placed in position shown in Fig. 1. Thesupporting arm 5 is providedwith a yoke member 7 on which is pivotally, mounted at 8 a movable yokemember :9- 1 adapted to be releasably held in position by' means of snapcatch or latch 10 pivotally mounted at 11 on the member 7 and adapt-' edto engage under a lug 12 ontheimovable yoke member 9, saidv lug beingundercut to retain the parts in position. A bear,

ing plate 13 iscarried by a manuallyoper ated screw 1 1 and is adapted.to engage the.

"sensual-472,032;

crank pin oftheengineshaft-indicated. at

15' to hold the same against a -V-block- 16f mounted} on j the crankpin. so as to provide table in the supporting means :3 byloosening clamp4 and turning rod- 3 insaid clamp,

so that the said plate may be swung to posij 1' tion shown-in'Fig. 1, toaline the piston when it is up, or to reverse position to aline thepiston when it is'down (the shaft being turned 180 degrees from theposition. shown in Fig. 1). By this" means the piston may be: alined'throughout its stroke.

The device is used as followsp' Theyoke' member 9'is released from theyokevmember 7 and said yoke members are placed around a throw or crankpin portion of a shaft, as indicated, a suitable V-block having beeninserted to adapt the device to the particular shaft for whichalinementis to be made, the'yoke member 9 being held ,in closed position bycatch" lOand the screw l llbeing operated to cause bearing plate .13

to press the shaft againstthe V-block, the

parts16 and,14l then embracing and fitting on the shaft.v The face plate1 isadjustedf,

by the clamping means 6 and 4 so as-to bring it to proper position forengaging "the cylindrical surface of the piston 17 corresponding -to thenext or adjacent throw 7 or crank -'pin"of the shaft and the piston isthen alined so as to cause-it to-stand snug and parallel plate.

to the finished surface of the If the piston idoes notffst'and snug andpar-. 9

allelto the plate it should be' made to dose.

1 l i This operation is then reversed to the other i side and finally"to the center again to check upon it." The surface of the face platebering formed as a plane surface perpendicularto the axis of the crankpin and to the axis of the engine shaft, the-device may be used fordetecting angulardisplacement of the piston pin, by swinging'thepiston ojits pin and noting Whether it rides fiat on the gauge plate surface asit should do if the piston pin is properly positioned.

1. An aligner for engine pistons comprising supporting means adapted toembrace and rotatably fit on a crank pin portion of the engine shaft;and a face plate rotatably mounted on the aforesaid supporting means toturn on an axis parallel to theaxis ofsaid shaft, said plate having analigning face formed a plane, extending perpendicular to the axis oftheshaft andadaptd to engage the face =of the piston. connected to saidshaft said face plate being eccen.tr1

callymounted onnits said support,- so as to have a greater; extension inone direction from its center of rotation than; in the oppositedirection;

2; An alignerfor engine pistons compris ing a faceplate adapted toengage laterally with the piston; a rod secured to said face plate, anarm having clamping means adiustably engagingjsaid rod, yoke member onsaid arm,-a mova'bl'eyoke member pivotally connected to aforesaid yokemember and a catch for holdingsaid yoke members in closed position; said"yoke members being pIQVlCleClJYlf/h means for'engaging a shaft and forholding the said face plate in a plane perpendicular to the axis of theshaft.

An alignerfas set forth in claim 2,

wherein said shaft engaging meanscomprise a V-block carried by one saidyoke members and means .adjustably mounted in the other of said yokemembers for engaging the shaft to hold it engagement with the said V-block.

In testimony whereof I havehereunto I scribed my name: this 29th day fApr 1921 i CARL or; srnnennennenm a

